Meh, how about the variance in purchasing power and cost of living among all the places that use just one currency? You'll find differences even greater than $8.
Prices are arbitrary. Locking USD = EUR makes you superficially feel like you're getting ripped off but it's still arbitrary. You're also paying the same as someone making $100k/year more or less than you.
Prices are arbitrary. Locking USD = EUR makes you superficially feel like you're getting ripped off but it's still arbitrary. You're also paying the same as someone making $100k/year more or less than you.